in hexane under strict exclusion of air and moisture using vac. line and glove boxtechniques and Schlenk glassware; Ga complex (12 equiv.) added dropwise to suspn. of Ru complex in n-hexane at room temp.; filtered; washed (n-hexane); dried; redissolved in toluene; filtered; solvent removed (vac.); recrystd. (n-hexane); elem anal.;